iswctype(3) Library Functions Manual iswctype(3) iswctype - LIBRARY Standard C library (libc, -lc) #include int iswctype(wint_t wc, wctype_t desc); If wc is a wide character having the character property designated by desc (or in other words: belongs to the character class designated by desc), then the iswctype() function returns nonzero. Otherwise, it returns zero. If wc is WEOF, zero is returned. desc , wctype(3). iswctype() , wc . 0. attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |iswctype() | | MT-Safe | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. POSIX.1-2001, C99. iswctype() LC_CTYPE . . iswalnum(3), iswalpha(3), iswblank(3), iswcntrl(3), iswdigit(3), iswgraph(3), iswlower(3), iswprint(3), iswpunct(3), iswspace(3), iswupper(3), iswxdigit(3), wctype(3) Azamat Hackimov , Dmitriy S. Seregin , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . iswctype(3)